Title: Study on urban combined sewer overflows and self-purification capacity load of river

Authors: Jin Haipan; Hu Zhenhua; Zhu Minxun; Wei Min; Liu Wenwen

Addresses: Business School, Central South University, Changsha, 410083, China; School of Economics and Management, Changsha Normal University, Changsha, 410199, China ' Business School, Central South University, Changsha, 410083, China ' School of Economics and Management, Changsha Normal University, Changsha, 410199, China ' School of Economics and Management, Changsha Normal University, Changsha, 410199, China ' Business School, Central South University, Changsha, 410083, China

Abstract: At present, the Chinese people pay more and more attention to the environment. Notably, the water environment conditions, which are related to urban residents, have garnered significant attention. To address urban river contamination by combined sewer overflows (CSO) during rainy periods, this study developed a measurement model based on the underlying causes, processes, and influential factors. The relationship between overflow influential factors and river water self-purification capacity load was explored using empirical data from an urban agglomeration in the Yangtze River Delta. The results indicate that increasing the collection rate of the pipe network and interception factors, extending the surface retention time of precipitation, and implementing sponge city initiatives can mitigate the impact of CSO-induced pollution on the water self-purification capacity load. However, each factor exerted a varying degree of impact. Therefore, it is imperative to select the most appropriate approach based on a specific situation.

Keywords: CSO; combined sewer overflows; sponge city facility; self-purification capacity load of river; Yangtze River Delta urban agglomerations.

DOI: 10.1504/IJEP.2023.137989

International Journal of Environment and Pollution, 2023 Vol.72 No.2/3/4, pp.222 - 241

Received: 04 Apr 2023
Accepted: 20 Oct 2023
Published online: 15 Apr 2024 *

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